Jackson Rathbone
In addition to being a part of the band 100 Monkeys, Jackson had been in The O.C., River's End, Close to Home and Pray for Morning before his Twilight days.
Taylor Lautner
Before he was forcing people to declare whether they were "Team Edward" or "Team Jacob," Taylor played less compelling parts in films such as Shadow Fury, The Adventures of Sharkboy and Lavagirl in 3-D and Cheaper by the Dozen 2.
Robert Pattinson
While Twilight may have helped him land the cover of Vanity Fair magazine, Robert actually had a part in the 2004 film by the same name (his scene was later deleted). He also was in Harry Potter and the Goblet of Fire and How to Be before he became everyone's favorite Twilight heartthrob.
Ashley Greene
While Twilight may have jump-started her career, you might have spotted Ashley in one of her TV roles on Punk'd, Crossing Jordan or MADtv prior to signing on to be a part of the über-popular film franchise.
Kellan Lutz
Prior to becoming one of the Twilight hotties, Kellan's career was so-so with films such as Stick It, Accepted and Prom Night.
Nikki Reed
If you thought Nikki's name sounded familiar when she joined the Twilight cast, you were right. In addition to being on the popular TV show The O.C., she was in many films, including Thirteen (which she cowrote!), Man of God and Lords of Dogtown.
Kristen Stewart
Kristen wasn't a total unknown before she landed the lead role of Bella Swan in Twilight. She had already starred in popular films such as Panic Room (alongside Jodie Foster), Cold Creek Manor and Speak.
Anna Kendrick
Although her career has totally taken off since Twilight, Anna didn't have a ton of experience prior to the films. In fact, she had only appeared on a few TV shows and done two small films (Camp and Rocket Science).
Dakota Fanning
Dakota probably had the most successful pre-Twilight career with hit films such as War of the Worlds, I Am Sam, Uptown Girls and The Cat in the Hat—just to name a few.
Cam Gigandet
This Twilight hottie is another alum from The O.C. He also made a few other TV appearances prior to joining Robsten on set, including an episode of CSI and his recurring role on The Young and the Restless.